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Spectroscopic analysis of high electric field enhanced ionization in laser filaments in air for corona guiding

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文摘 We report on a systematic experimental study on the fluorescence spectra produced from a femtosecond laser filament in air under a high electric field. The electric field alone was strong enough to create corona discharge (CD). Fluorescence spectra from neutral and ionic air molecules were measured and compared with pure high-voltage CD and pure laser filamentation (FIL). Among them, high electric field assisted laser FIL produced nitrogen fluorescence more efficiently than either pure CD or pure FIL processes. The nonlinear enhancement of fluorescence from the interaction of the laser filament and corona discharging electric field resulted in a more efficient ionization along the laser filament zone, which was confirmed by the spectroscopic measurement of both ionization-induced fluorescence and plasma-scattered 800 nm laser pulses. This is believed to be the key precursor process for filament-guided discharge.
来源 High Power Laser Science and Engineering ,2016,4(1):e8-1-e8-6 【核心库】
DOI 10.1017/hpl.2016.7
关键词 femtosecond laser filamentation ; filament induced fluorescence spectroscopy ; laser guided discharges
地址

1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, State Key Laboratory of High Field Laser Physics  

2. Centre d'Optique, Photonique et Laser (COPL) and Departement de physique, de genie physique et d'optique, Universite Laval, Canada, Quebec, G1V 0A6

语种 英文
文献类型 研究性论文
ISSN 2095-4719
学科 电子技术、通信技术
基金 supported in part by National Natural Science Foundation of China ;  国家973计划 ;  the Chinese Academy of Sciences and the State Key Laboratory of High Field Laser Physics ;  the 100 Talents Program of Chinese Academy of Sciences, and the Shanghai Pujiang Program
文献收藏号 CSCD:5797677

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引证文献 2 篇

1 杜盛喆 飞秒激光诱导电晕放电的优化设计方案 中国激光,2017,44(6):0601009-1-0601009-5
被引 4 次

2 Chen Na Harmonic generation at air–soil interface by femtosecond laser filament Chinese Optics Letters,2017,15(6):061902-1-061902-5
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